Windham is located in Windham county Connecticut with a geographic area of square miles. The total population in Windham is 24,618 with 47.4% male and 52.6% female. Children under age 5 represent 4.2% of the population, under age 18 equal 19.6% of the population and over age 65 is 13.6% of the population. The median household income is $42,909, per capita income is $21,427. There are a total of 8,939 housing units with 43.8% owner occupied. Education includes 32.4% of residents that are high school graduates and 19.7% with a bachelor's degree or higher. The average temperature in Windham in the summer is 68 degrees, and in the winter 27 degrees.